[woode]

In theory it's really easy, however in practice shit doesn't fit, is missing, etc a lot of the time and, well, it can get tricky.

Only you know if you have the knowledge/competence to do it. I have met some people who think they are master mechanics that know jack shit, and others that are pretty humble about what they know and I would fully trust on my car..

I recently went with FA20Club's turbo kit, which was advertised as a bolt-on kit.. I even verified with him that it was bolt-on because I didn't want to be fabbing stuff. Long story short I had to do about 10 hours worth of cutting, measuring, welding, grinding, fabbing lines, etc just to make his "bolt-on" kit work. I would hate to be somebody who orders that kit thinking it is a "bolt on" and doesn't have more than hand tools and jackstands.

As far as working on cars (and anything, really).. organization will help more than anything. Try to keep stuff separated and labeled, bolts that go to bumper in one bag, bolts that go to crash beam in one bag, etc.
Nothing is more frustrating when finishing working on a newer car and being left over with a handful of nuts/bolts that you don't know where they came from.. lol

Oh, and I would recommend having a backup transportation means "just in case"
Edit: just noticed you have a porsche and motorcycles at 19 years old so I am sure you won't have problems with that.